Ondas gravitacionales: un nuevo contacto de la física con la tecnología

La teoría de Einstein del campo gravitacional conocida como Relatividad General predice la existencia de ondas gravitacionales

Comparison of the eficacy and safety of 4 mg of ondansetron vs. 4 mg of nalbuphine for the treatment of neuraxial morphineinduced pruritus

Objective: To compare the eficacy and safety of 4 mg of ondansetron vs. 4 mg of nalbuphine for the treatment of neuraxial morphine-induced pruritus, in patients at the “Dr. José Eleuterio González” University Hospital from September 2012 to August 2013. Material and methods: A controlled, prospective, randomized study of 28 patients (14 per group) receiving neuraxial morphine analgesia was conducted, which was registered and approved by the ethics Committee of the Institution and patients agreed to participate in the study under informed consent. The results were segmented and contrasted (according to drug) by hypothesis testing; the association was determined by X2 with a 95% conidence interval (CI). Results: Pruritus was effectively resolved in both groups and no signiicant difference was found in the rest of the variables. An increase in the visual analogue scale (eVA) was observed at 6 and 12 hours for the ondansetron group, which was statistically signiicant (p≤0.05), however both groups had an eVA of less than 3. Conclusions: When comparing the eficacy and safety of ondansetron 4 mg vs. nalbuphine 4 mg for the treatment of neuraxial morphine induced pruritus, the only signiicant difference found was the mean eVA at 6 and 12 hours, favoring the ondansetron group. However, both groups scored less than 3 on the eVA. Therefore, we consider that both treatments are effective and safe in the treatment of pruritus caused by neuraxial morphine.

External ophthalmomyiasis by Oestrus ovis treated with tobacco: clinical case report and medical literature review

External ophthalmomyiasis is an infestation of conjunctiva with larvae or maggots of certain lies. Oestrus ovis is the most common cause of human ophthalmomyiasis. The case of a 16-yearold female is described, who presented with foreign body sensation, pain, and redness in the left eye. Slit-lamp biomicroscopy revealed 32 tiny larvae crawling around the conjunctival sac. The larvae were mechanically removed under topical anesthesia, and identiied under a light microscope as irst-stage larvae of O. ovis causing external ophthalmomyiasis. She was successfully treated with topical tobacco juice. Follow-up examination of these cases is recommended to avoid possible complications.